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Synthesis of a p-type semiconducting phenothiazine exfoliatable layered crystal
Minkyung Lee1, Ji Eun Park, Chibeom Park
1Department of Chemistry, Pohang University of Science and Technology (POSTECH), San 31, Hyoja-Dong, Nam-Gu, Pohang 790-784, Korea.
Abstract:
Phenothiazine (PTZ) crystals are grown by a physical vapor transport method in a horizontal tube furnace. The resulting disk-type PTZ single crystals have a layered structure, which can be mechanically exfoliated into stacked individual layers to exhibit various colors depending on the thickness. The PTZ single-crystal field-effect transistor (FET) devices exhibit a p-type semiconducting property with 3.03 × 10(-6) S/cm electrical conductivity, 1.15 × 10(-4) cm(2)/(V s) carrier mobility, and a 10(4) on/off ratio.
